Backend Development
PHP Problem
Examples to explain how to use php to implement paging function
Examples to explain how to use php to implement paging function
For a website with a lot of data, pagination is one of the indispensable functions. Using PHP pagination allows us to easily process and present large amounts of data, improve user experience, and naturally becomes an important part of PHP development.
The implementation of paging function generally includes several aspects: providing page templates, determining the number of data on each page, determining the total number of pages, and realizing page turning according to user needs. Below, we'll walk through each of these steps.
Provide page templates
The implementation of the paging function requires calling the HTML page, so we need to implement a basic HTML page template in PHP, for example:
<!DOCTYPE html> <html> <head> <title>分页功能实战</title> </head> <body> <!-- 页面内容 --> <div> <h2>PHP 分页演示</h2> <!-- 分页代码位置 --> <!-- 呈现数据的位置 --> </div> <!-- 分页代码位置 --> <div> <!-- 分页代码部分 --> </div> </body> </html>
In this basic In the HTML page, we need to use code blocks written in PHP to call data and generate pagination. Below are the code blocks that each page must contain.
Arrange the data displayed on each page
To implement paging, we need to determine the amount of data presented on each page. This number can be set manually in the background or dynamically according to user needs. For example, we set up to render 10 pieces of data per page. Then, the corresponding data can be presented based on the current page number. The code is as follows:
// 初始化每页显示的数量
$per_page = 10;
// 计算偏移量
if(isset($_GET["page"])) {
$page = $_GET["page"];
} else {
$page = 1;
}
$start_from = ($page-1) * $per_page;
// 查询数据库获取数据
$sql = "SELECT * FROM jobs LIMIT $start_from, $per_page";
$result = mysqli_query($conn, $sql);Here, we use the LIMIT keyword of the SQL statement to filter out relevant data.
Determine the total number of pages
One of the cores of paging is to determine the total number of pages. This amount can be found by querying the total number of data and dividing by the number of data displayed per page. The code is as follows:
// 获取数据总量 $total_pages_sql = "SELECT COUNT(*) FROM jobs"; $result = mysqli_query($conn, $total_pages_sql); $total_rows = mysqli_fetch_array($result)[0]; $total_pages = ceil($total_rows / $per_page);
Here, we use the COUNT keyword of the SQL statement to obtain the total number of data, and use the PHP ceil() function to achieve rounding up. This code also uses the previously determined amount of data per page and the code to calculate the offset.
Page turning according to user needs
The last step is to realize page turning according to user needs. This can be achieved by adding page jump links to the HTML page. For example, we can select a page to visit via a link. The code is as follows:
// 显示跳转链接
echo "<div id='pagination'>";
echo "<a href='index.php?page=1'>".'First Page'."</a> ";
for ($i=1; $i<=$total_pages; $i++) {
echo "<a href='index.php?page=".$i."'>".$i."</a> ";
};
echo "<a href='index.php?page=$total_pages'>".'Last Page'."</a> ";
echo "</div>";In this code, we generate a series of jump links based on the total number of pages, and write a regular expression to process the highlighting of the current page number. In this way, users can freely turn pages as needed.
The above are the steps to implement PHP paging. Simple design and writing allow you to easily process and present large amounts of data, improving user experience.
The above is the detailed content of Examples to explain how to use php to implement paging function. For more information, please follow other related articles on the PHP Chinese website!
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
AI Hentai Generator
Generate AI Hentai for free.
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
What are the best practices for deduplication of PHP arrays
Mar 03, 2025 pm 04:41 PM
This article explores efficient PHP array deduplication. It compares built-in functions like array_unique() with custom hashmap approaches, highlighting performance trade-offs based on array size and data type. The optimal method depends on profili
Can PHP array deduplication take advantage of key name uniqueness?
Mar 03, 2025 pm 04:51 PM
This article explores PHP array deduplication using key uniqueness. While not a direct duplicate removal method, leveraging key uniqueness allows for creating a new array with unique values by mapping values to keys, overwriting duplicates. This ap
Does PHP array deduplication need to be considered for performance losses?
Mar 03, 2025 pm 04:47 PM
This article analyzes PHP array deduplication, highlighting performance bottlenecks of naive approaches (O(n²)). It explores efficient alternatives using array_unique() with custom functions, SplObjectStorage, and HashSet implementations, achieving
How to Implement message queues (RabbitMQ, Redis) in PHP?
Mar 10, 2025 pm 06:15 PM
This article details implementing message queues in PHP using RabbitMQ and Redis. It compares their architectures (AMQP vs. in-memory), features, and reliability mechanisms (confirmations, transactions, persistence). Best practices for design, error
What Are the Latest PHP Coding Standards and Best Practices?
Mar 10, 2025 pm 06:16 PM
This article examines current PHP coding standards and best practices, focusing on PSR recommendations (PSR-1, PSR-2, PSR-4, PSR-12). It emphasizes improving code readability and maintainability through consistent styling, meaningful naming, and eff
What are the optimization techniques for deduplication of PHP arrays
Mar 03, 2025 pm 04:50 PM
This article explores optimizing PHP array deduplication for large datasets. It examines techniques like array_unique(), array_flip(), SplObjectStorage, and pre-sorting, comparing their efficiency. For massive datasets, it suggests chunking, datab
How Do I Work with PHP Extensions and PECL?
Mar 10, 2025 pm 06:12 PM
This article details installing and troubleshooting PHP extensions, focusing on PECL. It covers installation steps (finding, downloading/compiling, enabling, restarting the server), troubleshooting techniques (checking logs, verifying installation,
How to Use Reflection to Analyze and Manipulate PHP Code?
Mar 10, 2025 pm 06:12 PM
This article explains PHP's Reflection API, enabling runtime inspection and manipulation of classes, methods, and properties. It details common use cases (documentation generation, ORMs, dependency injection) and cautions against performance overhea
